TY - JOUR AU - A. Kh. Gelig TI - Stability of the solutions of a~mixed problem for a~hyperbolic equation of second order JO - Izvestiâ vysših učebnyh zavedenij. Matematika PY - 1960 SP - 104 EP - 112 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IVM_1960_3_a11/ LA - ru ID - IVM_1960_3_a11 ER -